Question: Give me the population of Copenhagen on the first of January 2017?
Paraphrase: How many people lived in Copenhagen, Denmark on January 1, 2017?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q1748 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'2017')) }